Patent GB-557498-A (GB)
Title: Improvements in or relating to coke oven door handling mechanism
IPC: C10B25/14
Filed: 1942-06-08
Abstract: 557,498. Operating coke oven doors. KOPPERS CO. June 8, 1942, No. 7813. Convention date. Jan. 5. [Class 55 (i)] The apparatus comprises a door-head assembly that is horizontally and vertically reciprocative both to operate the latches of, and to remove and restore the door of a coking chamber, and includes a device adapted to produce rotary movement of a latching element of a latch bar in opposite directions, and means for supporting the latch bar on the door-head assembly and for reciprocating the latch bar vertically independently of the door. The door-handling device is of the kind, described in Specification 523,257, which extracts the door from the oven face, raises it, and slews it round to facilitate cleaning before it is replaced. The machine 10, Fig. 1, is mounted on rails 11 in front of the coke oven battery along which it is propelled by an electric motor 14 with a reducing gear 15, a carriage 20 supporting the door operating means, and being moved transversely of the truck on rails 22 by a motor 25 with reducing gear 27 which operate arms 31, 33 coupled to a shaft 32, a resilient link 34 being interposed. A trip 35 cuts off current to motor 14 except when the carriage is in its retracted position. A screwed shaft 42 rotated by a motor 40 raises or lowers the housing 50 which is supported by a nut 51. A helicoidal race 54 is formed on the casing, and its side walls enclose a fixed roller 53 so that vertical movement of the casing causes the latter to slew round and carry with it the oven door when it is removed from its seat. Resilient control members, two each at the upper and lower parts of the assembly, each comprise a rod 55 around which is a spring 56 confined in a casing 57 and carrying a trigger plate 59, the end being secured to a forked member 61 in which is a roller 60 bearing against a boss 62 on the oven door. To remove a door the carriage 20 is advanced towards the door by motor 25 the rollers 60 contacting the bosses 62, and members 61 engage the latch bars 69. Further movement of the carriage causes trigger plates 59 to compress springs 56 and shorter levers 71 are freed, and with further movement a part 66 rotates handle 67 and cam 68 to release pressure on door by latch bar 69. Trigger plates 59 then contact with lever-lock bars 80 which compress springs 86 and move catch blocks 79 to release teeth 77 on longer levers 70 and allow springs 74 to rotate members 63 and cause portions 66 to pass behind handles 67. The door hooks 103, 104 have now entered openings 105 in the door, and motor 40 is started to rotate threaded shaft 42, and raise door head mechanism 38 so that lever handle 92 is moved away from trigger 100, and locking-jaw hooks 91 under pressure of springs 99 engage the latch-bars. Continued elevation of the door lifts the latch bars from their hooks, and the oven door is supported by the door hooks, the motor 40 being stopped, and the door withdrawn from the oven face by motor 25. Motor 40 is started again and the door head mechanism is further elevated and slewed sideways. Specification 556,723 also is referred to.